XML 15 R76.htm IDEA: XBRL DOCUMENT
v2.4.0.8

CONCENTRATIONS OF CREDIT RISK (Details) (USD $) In Millions, unless otherwise specified | Sep. 30, 2013 counterparty
--- | ---
Concentration Risk [Line Items] |
Number of large counterparties for which credit risk is disclosed | 5
Energy Producers And Their Affiliates [Member] |
Concentration Risk [Line Items] |
Accounts receivable | $ 22.8
Utility Companies And Their Affiliates [Member] |
Concentration Risk [Line Items] |
Accounts receivable | 23.5
Net receivable amount | 16.6
Largest Counterparties [Member] |
Concentration Risk [Line Items] |
Accounts receivable | 16.6
Net receivable amount | $ 14.5

X
- Definition Net carrying value as of the balance sheet date of receivables. Net carrying value can include contractual netting arrangements. + References No definition available. + Details
Name: | lg_NetCarryingOfReceivablesIncludingContractualNettingArrangements
Namespace Prefix: | lg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of large counterparties in terms of net accounts receivable exposure for which credit risk is reported. + References No definition available. + Details
Name: | lg_NumberOfCounterpartiesForWhichCreditRiskIsDisclosed
Namespace Prefix: | lg_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ConcentrationRiskLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition This item represents disclosure of all significant concentrations of credit risk or market risk arising from the subject financial instrument (as defined), whether from an individual counterparty or groups of counterparties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 3 -Subparagraph a, b -Article 5 + Details
Name: | us-gaap_FairValueConcentrationOfRiskAccountsReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant